Personal tools
You are here: Home Science & Projects Deisa Extreme Computing Initiative Projects 2010 - 2011 Inertial Particles in developing wall turbulence

Inertial Particles in developing wall turbulence

Project WALLPART
Research Area Engineering
Principal Investigator(s) Dr. L. Brandt
Prof. Carlo M. Casciola
Institution(s)
  • KTH, Sweden
  • Technical University of Eindhoven, The Netherlands
  • Technical University of Eindhoven, Department of Applied Physics, Eindhoven, The Netherlands
  • Universita di Roma la Sapienza, Dipartimento di Meccanica e Aeronautica, Italy

Abstract

Traditionally, direct numerical simulations (DNS) of turbulent flows are performed in simplified computational domains that are characterised by periodic boundary conditions in all three directions. However, real applications in nature and technology often involve the interaction with a solid wall and are thus inhomogeneous is space. Here, we study the flow case of a spatially evolving turbulent boundary layer and focus on the combined advection of inertial particles. Such a computational study based on highly resolved DNS and not yet attempted in the literature, bears many interesting and relevant physical effects due to the growing boundary layer; for instance the non-dimensional number characterising the particle-wall accumulation is gradually changing with the downstream distance. The raw scientific data is planned to be shared with the scientific community (iCFDdatabase, http://cfd.cineca.it).

From a computational point of view, spatially developing flows are necessarily investigated in very long domains in order to accurately capture the whole streamwise extent of the (physical) flow; another problem is the reliable and trustworthy generation of inflow turbulence in a non-periodic setting. It is thus only recently that the DNS of turbulent boundary layers has become feasible. The additional complexity of coupling the advection of inertial particles leads to large computational demands on massively parallel computers.

Document Actions